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  <div class="section" id="numpy-random-randomstate-random-sample">
<h1>numpy.random.RandomState.random_sample<a class="headerlink" href="#numpy-random-randomstate-random-sample" title="Permalink to this headline">¶</a></h1>
<p>method</p>
<dl class="method">
<dt id="numpy.random.RandomState.random_sample">
<code class="sig-prename descclassname">RandomState.</code><code class="sig-name descname">random_sample</code><span class="sig-paren">(</span><em class="sig-param">size=None</em><span class="sig-paren">)</span><a class="headerlink" href="#numpy.random.RandomState.random_sample" title="Permalink to this definition">¶</a></dt>
<dd><p>Return random floats in the half-open interval [0.0, 1.0).</p>
<p>Results are from the “continuous uniform” distribution over the
stated interval.  To sample <img class="math" src="../../../_images/math/3984ebcaea2b0aac1ccc1e1135cdabd04ca4a5ff.svg" alt="Unif[a, b), b &gt; a"/> multiply
the output of <a class="reference internal" href="numpy.random.random_sample.html#numpy.random.random_sample" title="numpy.random.random_sample"><code class="xref py py-obj docutils literal notranslate"><span class="pre">random_sample</span></code></a> by <em class="xref py py-obj">(b-a)</em> and add <em class="xref py py-obj">a</em>:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="p">(</span><span class="n">b</span> <span class="o">-</span> <span class="n">a</span><span class="p">)</span> <span class="o">*</span> <span class="n">random_sample</span><span class="p">()</span> <span class="o">+</span> <span class="n">a</span>
</pre></div>
</div>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>New code should use the <code class="docutils literal notranslate"><span class="pre">random</span></code> method of a <code class="docutils literal notranslate"><span class="pre">default_rng()</span></code>
instance instead; see <em class="xref py py-obj">random-quick-start</em>.</p>
</div>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><dl class="simple">
<dt><strong>size</strong><span class="classifier">int or tuple of ints, optional</span></dt><dd><p>Output shape.  If the given shape is, e.g., <code class="docutils literal notranslate"><span class="pre">(m,</span> <span class="pre">n,</span> <span class="pre">k)</span></code>, then
<code class="docutils literal notranslate"><span class="pre">m</span> <span class="pre">*</span> <span class="pre">n</span> <span class="pre">*</span> <span class="pre">k</span></code> samples are drawn.  Default is None, in which case a
single value is returned.</p>
</dd>
</dl>
</dd>
<dt class="field-even">Returns</dt>
<dd class="field-even"><dl class="simple">
<dt><strong>out</strong><span class="classifier">float or ndarray of floats</span></dt><dd><p>Array of random floats of shape <em class="xref py py-obj">size</em> (unless <code class="docutils literal notranslate"><span class="pre">size=None</span></code>, in which
case a single float is returned).</p>
</dd>
</dl>
</dd>
</dl>
<div class="admonition seealso">
<p class="admonition-title">See also</p>
<dl class="simple">
<dt><a class="reference internal" href="numpy.random.Generator.random.html#numpy.random.Generator.random" title="numpy.random.Generator.random"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Generator.random</span></code></a></dt><dd><p>which should be used for new code.</p>
</dd>
</dl>
</div>
<p class="rubric">Examples</p>
<div class="doctest highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">&gt;&gt;&gt; </span><span class="n">np</span><span class="o">.</span><span class="n">random</span><span class="o">.</span><span class="n">random_sample</span><span class="p">()</span>
<span class="go">0.47108547995356098 # random</span>
<span class="gp">&gt;&gt;&gt; </span><span class="nb">type</span><span class="p">(</span><span class="n">np</span><span class="o">.</span><span class="n">random</span><span class="o">.</span><span class="n">random_sample</span><span class="p">())</span>
<span class="go">&lt;class &#39;float&#39;&gt;</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">np</span><span class="o">.</span><span class="n">random</span><span class="o">.</span><span class="n">random_sample</span><span class="p">((</span><span class="mi">5</span><span class="p">,))</span>
<span class="go">array([ 0.30220482,  0.86820401,  0.1654503 ,  0.11659149,  0.54323428]) # random</span>
</pre></div>
</div>
<p>Three-by-two array of random numbers from [-5, 0):</p>
<div class="doctest highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">&gt;&gt;&gt; </span><span class="mi">5</span> <span class="o">*</span> <span class="n">np</span><span class="o">.</span><span class="n">random</span><span class="o">.</span><span class="n">random_sample</span><span class="p">((</span><span class="mi">3</span><span class="p">,</span> <span class="mi">2</span><span class="p">))</span> <span class="o">-</span> <span class="mi">5</span>
<span class="go">array([[-3.99149989, -0.52338984], # random</span>
<span class="go">       [-2.99091858, -0.79479508],</span>
<span class="go">       [-1.23204345, -1.75224494]])</span>
</pre></div>
</div>
</dd></dl>

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